4 # -------------------------------------------------------------------
5 # $Id: sqlt-diff,v 1.14 2007-03-01 22:16:00 duality72 Exp $
6 # -------------------------------------------------------------------
7 # Copyright (C) 2002-4 The SQLFairy Authors
9 # This program is free software; you can redistribute it and/or
10 # modify it under the terms of the GNU General Public License as
11 # published by the Free Software Foundation; version 2.
13 # This program is distributed in the hope that it will be useful, but
14 # WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 # General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program; if not, write to the Free Software
20 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 # -------------------------------------------------------------------
26 sqlt-diff - find the differences b/w two schemas
34 For a list of all valid parsers:
40 sqlt-diff [options] file_name1=parser file_name2=parser
44 -d|--debug Show debugging info
45 -t|--trace Turn on tracing for Parse::RecDescent
46 -c|--case-insensitive Compare tables/columns case-insenstiviely
47 --ignore-index-names Ignore index name differences
48 --ignore-constraint-names Ignore constraint name differences
52 sqlt-diff is a utility for creating a file of SQL commands necessary to
53 transform the first schema provided to the second. While not yet
54 exhaustive in its ability to mutate the entire schema, it will report the
61 Using the Producer class of the target (second) schema, any tables missing
62 in the first schema will be generated in their entirety (fields, constraints,
65 =item * Missing/altered fields
67 Any fields missing or altered between the two schemas will be reported
70 ALTER TABLE <table_name>
72 [CHANGE <field_name> <datatype> (<size>)] ;
74 =item * Missing/altered indices
76 Any indices missing or of a different type or on different fields will be
77 indicated. Indices that should be dropped will be reported as such:
79 DROP INDEX <index_name> ON <table_name> ;
81 An index of a different type or on different fields will be reported as a
84 CREATE [<index_type>] INDEX [<index_name>] ON <table_name>
85 ( <field_name>[,<field_name>] ) ;
89 "ALTER/DROP TABLE" and "CREATE INDEX" statements B<are not> generated by
90 the Producer, unfortunately, and may require massaging before being passed to
95 # -------------------------------------------------------------------
101 use SQL::Translator::Diff;
102 use SQL::Translator::Schema::Constants;
104 use vars qw( $VERSION );
105 $VERSION = sprintf "%d.%02d", q$Revision: 1.14 $ =~ /(\d+)\.(\d+)/;
107 my ( @input, $list, $help, $debug, $trace, $caseopt , $ignore_index_names, $ignore_constraint_names );
108 for my $arg ( @ARGV ) {
109 if ( $arg =~ m/^-?-l(ist)?$/ ) {
112 elsif ( $arg =~ m/^-?-h(elp)?$/ ) {
115 elsif ( $arg =~ m/^-?-d(ebug)?$/ ) {
118 elsif ( $arg =~ m/^-?-t(race)?$/ ) {
121 elsif ( $arg =~ m/^-?-c(ase-insensitive)?$/ ) {
124 elsif ( $arg =~ m/^--ignore-index-names$/ ) {
125 $ignore_index_names = 1;
127 elsif ( $arg =~ m/^--ignore-constraint-names?$/ ) {
128 $ignore_constraint_names = 1;
130 elsif ( $arg =~ m/^([^=]+)=(.+)$/ ) {
131 push @input, { file => $1, parser => $2 };
134 pod2usage( msg => "Unknown argument '$arg'" );
138 pod2usage(1) if $help || !@ARGV;
139 pod2usage('Please specify only two schemas to diff') if scalar @input > 2;
141 my $tr = SQL::Translator->new;
142 my @parsers = $tr->list_parsers;
143 my %valid_parsers = map { $_, 1 } @parsers;
146 print "\nParsers:\n", map { "\t$_\n" } sort @parsers;
151 pod2usage( msg => 'Too many file args' ) if @input > 2;
153 my ( $source_schema, $source_db, $target_schema, $target_db ) = map {
154 my $file = $_->{'file'};
155 my $parser = $_->{'parser'};
157 die "Unable to read file '$file'\n" unless -r $file;
158 die "'$parser' is an invalid parser\n" unless $valid_parsers{ $parser };
160 my $t = SQL::Translator->new;
163 $t->parser( $parser ) or die $tr->error;
164 my $out = $t->translate( $file ) or die $tr->error;
165 my $schema = $t->schema;
166 unless ( $schema->name ) {
167 $schema->name( $file );
173 my $result = SQL::Translator::Diff::schema_diff($source_schema, $source_db,
174 $target_schema, $target_db,
175 { caseopt => $caseopt,
176 ignore_index_names => $ignore_index_names,
177 ignore_constraint_names => $ignore_constraint_names,
186 print "No differences found.";
189 # -------------------------------------------------------------------
190 # Bring out number weight & measure in a year of dearth.
192 # -------------------------------------------------------------------
198 Ken Y. Clark E<lt>kclark@cpan.orgE<gt>.
202 SQL::Translator, L<http://sqlfairy.sourceforge.net>.